To use a ruler, place it alongside or on top of the object or line that is to be measured and count the number of marks from edge to edge of the object. For those who are working with a metric ruler, the longer lines are... More » Science Measurements

The little lines on a metric ruler mark the millimeters between centimeters, while the little lines on an English ruler mark the eighths and 16ths between inches. Some English rulers may only have lines at every 1/2 inch... More » Education K-12

A metric ruler is used to measure things in centimeters and millimeters with 1 centimeter equaling 10 millimeters, so a ruler will have 10 tiny millimeter lines between each centimeter to denote the millimeter. This can ... More » Education K-12
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A person measures in millimeters by comparing the length of the object in question with the tick marks on a metric ruler or the metric side of a standard ruler. The metric side is labeled in millimeters or centimeters wi... More » Science Measurements

Read the length of an object by counting the whole-inch markers in between the ruler's zero-inch line and the object's end and then measuring the fraction of the last inch by counting the remaining small increments. Engl... More » Science Measurements

A metric ruler is used to measure the length, height and width of an object or the distance between two points, objects or places. Depending on the length of the metric ruler, it can be divided into millimeters, centimet... More » Science Measurements

You can measure the length, width and height of any object by using a measuring device, such as a ruler or tape measure. Laying the object on a flat surface also helps to get more accurate figures. More » Science Measurements